Kim Taylor / Golden eyed horse fly (Chrysops quadratus) female on acorn, Surrey, England, August

Paul Harcourt Davies / Deer / Horsefly (Chrysops relictus) close-up of characteristically reflective eyes, Montecucco, Italy, Europe.

Paul Harcourt Davies / Deer / Horse fly (Chrysops relictus) close-up portrait, on grass stems, Italy, Europe

Dan Burton / Dan Burton, photographer, with his motorised paraglider that enables him to fly at 30ft to photograph the reindeer being rounded up in Lapland, Sweden, November 2009

Nick Upton / Deer fly (Silvius alpinus) with green eyes nectar feeding from flowers, Pyrenees, Spain

Andy Sands / Deer fly (Chrysops quadratus) on fir cone, Captive, UK

Kim Taylor / Deer Fly (Lipoptena cervi) on the back of a Roe Deer.

Premaphotos / Deer fly (Chrysops fulvaster) female taking blood from a man's arm, Utah, USA

Premaphotos / Splayed deer fly (Chrysops caecutiens), dark male, UK